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Stable work surface is a critical factor for accurate weighing of potent Active Pharmaceutical Ingredients. The purpose of this study is to verify the stability of the work surface to ensure accurate and repeatable powder weight readouts using a sensitive micro balance placed in the work zone of the Esco PowderMax™ balance enclosure.

One of the most important approaches to ensure safe handling of potent Active Pharmaceutical Ingredients is the containment performance of the balance enclosure. The purpose of this study is to verify the containment performance of the Esco PowderMax™ balance enclosure when tested using naproxen sodium as surrogate powder in actual weighing operation.